2121000100023 has 64 divisors (see below), whose sum is σ = 3356670080000. Its totient is φ = 1190479006080.

The previous prime is 2121000099991. The next prime is 2121000100031. The reversal of 2121000100023 is 3200010001212.

It is not a de Polignac number, because 2121000100023 - 2⁵ = 2121000099991 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2121000099981 and 2121000100008.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121000100223) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 45986628 + ... + 46032726.

It is an arithmetic number, because the mean of its divisors is an integer number (52447970000).

Almost surely, 2^{2121000100023} is an apocalyptic number.

2121000100023 is a deficient number, since it is larger than the sum of its proper divisors (1235669979977).

2121000100023 is an equidigital number, since it uses as much as digits as its factorization.

2121000100023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46917 (or 46903 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

Adding to 2121000100023 its reverse (3200010001212), we get a palindrome (5321010101235).

The spelling of 2121000100023 in words is "two trillion, one hundred twenty-one billion, one hundred thousand, twenty-three".